CDC 2A652 Vol. 4
Settings
Aerospace Ground Equipment Journeyman Common AGE Systems. Edit Code 05.
- 1.What component on the New Generation Heater activates the HCU?
- A.
Oil pressure switch.
- B.
Burner control unit.
- C.
Heat control switch.
- D.
Thermostatic sensor.
- 2.The HCU on the New Generation heater starts the main air fan for output air when
- A.
A heat setting is selected.
- B.
Constant flame is established.
- C.
The temperature gauge reads cool.
- D.
The inside temperature reaches 140 degrees F.
- 3.
- A.
During the engine start up with the ignition switch in PREHEAT position.
- B.
Never, as it will result in serious engine damage.
- C.
When the temperature gauge reads COOL.
- D.
When ambient temperature is below 32 degrees F.
- 4.Repair of ground heater equipment should never be attempted
- A.
Without first talking with the operator.
- B.
Without first consulting your supervisor.
- C.
Unless accurate technical data is available.
- D.
Unless in the presence of an experienced mechanic.
- 5.The amount of heat required to raise the temperature of one pound of a substance on degree Fahrenheit is known as
- A.
British thermal unit.
- B.
Sensible unit.
- C.
Specific heat.
- D.
Latent heat.
- 6.Heat that can be felt and added or subtracted to a substance without changing its state is called
- A.
Super heat.
- B.
Latent heat.
- C.
Specific heat.
- D.
Sensible heat.
- 7.Heat added to a gaseous substance is known as
- A.
Sensible heat.
- B.
Specific heat.
- C.
Super heat.
- D.
Latent heat.
- 8.The relationship between pressure and the boiling point of a liquid is seen when
- A.
Pressure increases, it raises the boiling point.
- B.
Pressure increases, it lowers the boiling point.
- C.
The boiling point increases, it raises the pressure.
- D.
The boiling point increases, it lowers the pressure.
- 9.The factors that have the greatest bearing on the temperature of a refrigerant are the boiling of a liquid and the amount of heat applied and the
- A.
Temperature of the vapor.
- B.
Type of heat transfer.
- C.
Moisture in the air.
- D.
Pressure applied.
- 10.What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?
- A.
Blower control switch.
- B.
Airflow control switch.
- C.
Evaporator control switch.
- D.
Temperature control switch.
- 11.What type of solution is used in the MA-3D aftercooler system to carry heat away from the conditioned air stream?
- A.
Liquid refrigerant.
- B.
Gaseous refrigerant.
- C.
Pure water solution.
- D.
Ethylene glycol/water solution.
- 12.Refrigerant that leaves the evaporator coil in the MA-3D air conditioner is further changed into a
- A.
Low pressure gas.
- B.
High pressure gas.
- C.
Low pressure liquid.
- D.
High pressure liquid.
- 13.After the refrigerant leaves the compressor on the MA-3D air conditioner, it passes through the oil separator and into the
- A.
Heatsink coils.
- B.
Condenser coils.
- C.
Evaporator coils.
- D.
Receiver inlet valve.
- 14.When starting the MA-3D air conditioner, hold the safety override switch until
- A.
30 psi oil pressure is registered on the engine oil pressure gauge.
- B.
You release the start switch.
- C.
The engine warms up.
- D.
The engine starts.
- 15.What component on the MA-3D air conditioner receives input from sensors for suction pressure and leaving air temperature?
- A.
Air cooler fan.
- B.
Air volume controller.
- C.
Temperature controller.
- D.
Temperature control knob.
- 16.What component on the MA-3D air conditioner shuts off the compressor when the suction pressure drops below 5 psi?
- A.
Low pressure cutout.
- B.
High pressure cutout.
- C.
Temperature controller.
- D.
Temperature control switch.
- 17.What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?
- A.
Inward leaks.
- B.
Vacuum leaks.
- C.
Pressure leaks.
- D.
Outward leaks.
- 18.When performing refrigerant recovery, be sure
- A.
To use vacuum pumps.
- B.
To use the HCU.
- C.
The output air is between 150°F – 185°F.
- D.
The refrigerant has become a low-pressure vapor for compressor use.
- 19.The air cycle machine of an A/M32C–10D air conditioner consists of
- A.
A air compressor fan only.
- B.
An expansion turbine only.
- C.
A heat exchanger and an expansion turbine.
- D.
An expansion turbine and a compressor fan.
- 20.The component of a A/M32C–10D air conditioner that extracts energy from the bleed air on the air cycle machine is the
- A.
Compressor.
- B.
Heat exchanger.
- C.
Expansion turbine.
- D.
Temperature controller.
- 21.The compressor switch on the ACE 802S must be held in the HOLD position when engaging the compressor in order to
- A.
Ensure the engine is at governed speed before engaging compressor.
- B.
Allow the oil and discharge pressures to stabilize.
- C.
Defrost the evaporator.
- D.
Build-up oil pressure.
- 22.
- A.
Condensing refrigerant absorbs heat from the air stream.
- B.
Boiling refrigerant absorbs heat from the air stream.
- C.
Condensing refrigerant looses heat to the air stream.
- D.
Boiling refrigerant looses heat to the air stream.
- 23.What system on the ACE 802S air conditioner “supercharges” the compressor?
- A.
Defrost.
- B.
Heat boost.
- C.
Vapor injection.
- D.
Liquid injection.
- 24.What valve must be opened prior to starting the engine on the ACE 802S?
- A.
Air shutoff.
- B.
Fuel shutoff.
- C.
Coolant control.
- D.
Refrigerant flow.
- 25.What must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?
- A.
Permit refrigerant pressure to equalize.
- B.
Perform maximum refrigerant pump down.
- C.
Place heating/cooling switch in HEATING position.
- D.
Place the reversing valve lever in the HEATING position.
- 26.In troubleshooting, what is the first step that must be completed when a unit comes in with a write-up in the forms?
- A.
Isolate the problem.
- B.
Perform a service inspection.
- C.
Perform an operational check.
- D.
Recognize the write-up as a malfunction.
- 27.How can a restriction in a refrigerant system be identified?
- A.
Frosting at the outlet.
- B.
Sweating of the outlet.
- C.
Increased suction pressure.
- D.
Loosen fittings to check flow.
- 28.Oil in the rotary vane compressor
- A.
Lubricates the connecting rods.
- B.
Has high viscosity and is very inflammable.
- C.
Forms a seal between the vanes and the stator.
- D.
Permits it to be typed as a high pressure unit.
- 29.What provides pressurized oil to the rotor blades of the MC-2A rotary sliding vane compressor?
- A.
Hollow-ported bolt.
- B.
Drilled passages.
- C.
Rotor shaft.
- D.
Stator shaft.
- 30.On the MC-2A rotary sliding vane compressor, the minimum pressure valve does all of the following except
- A.
Ensure minimum pressure within the oil chamber.
- B.
Ensure minimum pressure to the condensate drain.
- C.
Prevent receiver air from flowing back to the compressor by working as a check valve.
- D.
Increase the efficiency of the felt pads by ensuring they receive a constant minimum air pressure.
- 31.What medium is used to cool the MC-2A rotary vane compressor?
- A.
Oil.
- B.
Air.
- C.
Water.
- D.
Hydraulic fluid.
- 32.What is the air output of the MC-2A rotary sliding vane compressor?
- A.
High volume, high pressure.
- B.
High volume, low pressure.
- C.
Low volume, high pressure.
- D.
Low volume, low pressure.
- 33.The valves on a reciprocating compressor are operated by
- A.
Atmospheric pressure.
- B.
Electrical input.
- C.
Oil pressure.
- D.
Pushrods.
- 34.Oil-moisture traps are required on a multi-stage reciprocating compressor to
- A.
Cool the compressed air.
- B.
Ensure even compression of the air.
- C.
Introduce moisture to the compressed air.
- D.
Remove moisture from the compressed air.
- 35.During an inspection on an LN2 cart, you should look at all of the following except the
- A.
Brake assembly.
- B.
Engine oil level.
- C.
Unit for cleanliness.
- D.
Front end alignment.
- 36.When LOX carts are being transported, what position should the vent valve be in?
- A.
Tow.
- B.
Closed.
- C.
Opened.
- D.
Transport.
- 37.How is the air compressor in the SGNSC categorized?
- A.
High-pressure.
- B.
Low-pressure.
- C.
High volume.
- D.
Low volume.
- 38.What component on the SGNSC removes nitrogen from the ambient air?
- A.
Filters.
- B.
Carbon absorber.
- C.
Booster compressor.
- D.
Separation membrane.
- 39.To start the SGNSC, the operator must place the ignition switch in the start position for no more than
- A.
5 seconds.
- B.
10 seconds.
- C.
15 seconds.
- D.
20 seconds.
- 40.At what storage cylinder pressure, in psig, should the SGNSC nitrogen booster compressor stop?
- A.
2400 psig.
- B.
4100 psig.
- C.
4400 psig.
- D.
6400 psig.
- 41.
- A.
2/3 to 3/4 inch from the bottom of the glass.
- B.
2/3 to 3/4 inch from the top of the glass.
- C.
1/2 inch from the bottom of the glass.
- D.
1/2 inch from the top of the glass.
- 42.During an operational check of an SGNSC you find that the engine starts, is running at 3,000 rpm, but the nitrogen purity does not reach 95.5% within 30 minutes. What is a probable cause of this malfunction?
- A.
Warming door is not lowered for cold weather operating conditions.
- B.
Low oil level in the feed air compressor lubricant separator tank.
- C.
Booster compressor defective.
- D.
Poor air ventilation.
- 43.What is important to keep in mind when performing maintenance on the SGNSC?
- A.
Weather conditions.
- B.
Wind direction.
- C.
Ventilation.
- D.
Safety.
- 44.When filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand, the reservoir selector valve must be in the
- A.
Open position.
- B.
Stand position.
- C.
Aircraft position.
- D.
External position.
- 45.The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the
- A.
Relief valves.
- B.
Aircraft pumps.
- C.
Low pressure filters.
- D.
High pressure pump.
- 46.In the MJ-2A-1 hydraulic test stand, the output volume of the high pressure pump is controlled by the
- A.
Volume control.
- B.
Flow control valve.
- C.
Compensator control.
- D.
Flowmeter assembly.
- 47.If the position of the reservoir selector valve is changed in the hydraulic test stand during operation, the operator may cause the
- A.
Flowmeter to be damaged.
- B.
Aircraft reservoir to overfill.
- C.
Flow control valve seals to rupture.
- D.
Return system pressure to decrease.
- 48.What engine system safety device on the MJ-2A-1 hydraulic test stand sounds the warning horn in the event of an engine system malfunction?
- A.
Water level switch.
- B.
Oil pressure switch.
- C.
Fuel level indicator.
- D.
Fuel pressure switch.
- 49.When setting the controls for operation of the MJ-2A-1 hydraulic test stand, what control must you set in the OPEN position?
- A.
Compensator control valve.
- B.
Return system bypass valve.
- C.
Supply shut-off valve.
- D.
System selector valve.
- 50.When filling and bleeding the MJ-2A-1 hydraulic test stand, the system should be pressurized and bled until
- A.
A solid line of fluid can be seen in the sight tube.
- B.
The sight tube is filled with bubbles.
- C.
Sight tube fluid turns a milky color.
- D.
Sight tube fluid is blue in color.
- 51.What is the most important logical step in troubleshooting a malfunction?
- A.
Analysis.
- B.
Isolation.
- C.
Recognition.
- D.
Verification.
- 52.
- A.
Ensure there is no pressure in the system.
- B.
Replace it with the same type of line.
- C.
Mark the location of the line.
- D.
Seal all openings.
- 53.The volume of oil delivered from the variable displacement hydraulic pump to the fixed displacement hydrostatic motor of the MJ-1B bomblift determines the
- A.
Direction of movement of the lift arms.
- B.
Speed of movement of the lift arms.
- C.
Direction of movement of the truck.
- D.
Speed of movement of the truck.
- 54.What prevents overpressurization of the steering system of the MJ-1B bomblift?
- A.
Bleed valve.
- B.
Relief valve.
- C.
Bypass valve.
- D.
Pressure regulator.
- 55.What valve on the MJ-1B bomblift prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure?
- A.
Air bleed.
- B.
Rotary by-pass.
- C.
Counterbalance.
- D.
Over pressurization.
- 56.As soon as the engine of the MJ-1B starts, you should check for sufficient
- A.
Hydraulic pressure.
- B.
Battery charging.
- C.
Fuel pressure.
- D.
Oil pressure.
- 57.During an operational check of the MJ-1B bomblift, all hydraulic components should exhibit
- A.
A smooth movement with no binding or no jumping.
- B.
Fast steady movements with minimal jumping.
- C.
Some settling once the actuator is released.
- D.
Small amounts of residue.
- 58.What is the purpose of the rear control shutoff valve on the MHU-83C/E bomblift?
- A.
Isolates the brake valve.
- B.
Isolates the counterbalance valve.
- C.
Cuts off fluid through the hydrostatic drive.
- D.
Cuts off fluid through the rear control valves.
- 59.What component on the MHU-83C/E bomblift supplies the brake valve and calipers with fluid?
- A.
System pump.
- B.
Steering pump.
- C.
Transmission pump.
- D.
Hydraulic system control valve.
- 60.When verifying the proper operation of the centering mechanism on the MHU-83C/E bomblift, the unit should
- A.
Start in reverse.
- B.
Move in neutral.
- C.
Not start in reverse.
- D.
Not move in neutral.
- 61.You check the backup hydraulic system on the MHU-83C/E bomblift by
- A.
Closing the shutoff valve.
- B.
Operating the hand pump.
- C.
Closing the air bleed valve.
- D.
Operating the system pump.
- 62.If there is a discrepancy between the workcards and TO, you should refer to
- A.
The TO.
- B.
The workcards.
- C.
Your supervisor.
- D.
Both the TO and workcards.
- 63.
- A.
An audible click will be heard and the locking lever will move downward.
- B.
The unit will not move in reverse and an audible click will be heard.
- C.
Locking lever will move upward and an audible click will be heard.
- D.
The unit starts and moves in both directions.
- 64.When troubleshooting the electrical system on the MJ-1B bomblift, what component will give you a visual indication that the alternator is charging?
- A.
Ammeter.
- B.
Voltmeter.
- C.
Head light.
- D.
Control panel light.
- 65.The engine safety circuits on the FL-1D shutdown the engine by
- A.
Opening the fuel solenoid.
- B.
Closing the engine intake air.
- C.
Shutting off fuel to the engine.
- D.
Tripping the protective circuit breaker.
- 66.What is used to raise the mast on the FL-1D?
- A.
Screw mechanism.
- B.
Pneumatic controls.
- C.
Hydraulic cylinder.
- D.
Hand-operated cable.
- 67.What must you do prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D?
- A.
Secure all doors.
- B.
Warm-up the engine.
- C.
Set the master control switch to ON.
- D.
Position the towbar to the left or right.
- 68.When a unit comes in with a write-up, how do you verify a malfunction exists?
- A.
Operate the unit.
- B.
Analyze the problem.
- C.
Perform a service inspection.
- D.
Give several probable causes.
- 69.Where can you find test procedures for a particular component?
- A.
Unit manufacturer’s TO.
- B.
Periodic inspection workcards.
- C.
Service inspection workcards.
- D.
Illustrated parts breakdown.
- 70.On the outriggers of the split deck maintenance platform, what prevents accidental loss of cylinder extension?
- A.
Electric solenoids.
- B.
Pressure switches.
- C.
Pilot check valve.
- D.
Limit switch.
- 71.What are the two lifting capacities of the davit (lift pulley) on the maintenance platform?
- A.
150 lbs or 550 lbs.
- B.
250 lbs or 500 lbs.
- C.
550 lbs or 2000 lbs.
- D.
1000 lbs or 2000 lbs.
- 72.What switch, when turned to the OFF position will prevent all control console functions except platform lowering and engine operation?
- A.
Lift switch.
- B.
Outriggers switch.
- C.
Emergency switch.
- D.
Mode selection switch.
- 73.When troubleshooting the split deck maintenance platform, how do you bypass the long scissors control cable and operate the control console while observing the test meter?
- A.
Plug the control console directly into the hydraulic control module.
- B.
Disconnect the control console from the hydraulic control module.
- C.
Energize the malfunctioning system.
- D.
Cut the scissors control cable.
- 74.While operating the split deck maintenance platform you realize the platform will not lower, the probable cause could be
- A.
Corroded battery cables.
- B.
A defective control cable.
- C.
The main disconnect switch is ON.
- D.
The engine switch is in RUN position.
- 75.What component provides manual speed adjustment on the AF/M32T-1 cabin leakage tester?
- A.
Tachometer.
- B.
Diesel engine.
- C.
Throttle assembly.
- D.
Fuel system relief valve.
- 76.If the air intake of the AF/M32T-1 cabin leakage tester was restricted, what effect would it have on operation?
- A.
High blower output.
- B.
Low blower output.
- C.
High cabin pressure.
- D.
Correct cabin pressure.
- 77.What is the reservoir fluid capacity and system pressure of the hydraulic pump on the B-6, 10-ton hydraulic tripod jack?
- A.
2.1 gallons at 2250 psi.
- B.
1.5 gallons at 2200 psi.
- C.
1.1 gallons at 2235 psi.
- D.
1.0 gallons at 1135 psi.
- 78.What component on the B-1 adjustable aircraft maintenance platform allows the work platform and steps to remain parallel to the base at any desired platform height?
- A.
Base assembly.
- B.
Upper platform.
- C.
Stair support linkage.
- D.
Hydraulic cylinder assembly.
- 79.What controls the speed of retraction of the hydraulic cylinder assembly on the B-1 adjustable aircraft maintenance platform?
- A.
Handle on the bypass valve.
- B.
Upper structure assembly.
- C.
Flow control valve.
- D.
Pump handle.
- 80.What type of mechanism does the B-4 adjustable aircraft maintenance platform utilize to raise and lower the platform?
- A.
Screw.
- B.
Scissor.
- C.
Ratchet.
- D.
Pneumatic.
- 81.What section of the towbar has a screw actuated fork assembly that is used to engage or disengage the aircraft nose gear?
- A.
Head adapter assembly.
- B.
Main tube assembly.
- C.
Extension tubes.
- D.
Lift actuator.
- 82.The purpose of the lift mechanism on the towbar is to
- A.
Adjust the forks.
- B.
Stabilize the main tube assembly.
- C.
Raise and lower the wheel assemblies.
- D.
Engage or disengage the aircraft nose gear.
- 83.What position would you put the valve handle in to precharge the supply tank of the PMU-29/E oil cart?
- A.
BYPASS.
- B.
OPEN.
- C.
OFF.
- D.
ON.
- 84.When servicing the hydraulic cart, what prevents large particles in the fluid from entering the reservoir?
- A.
Line filter.
- B.
Check valve.
- C.
Mesh screen.
- D.
Relief valve.
- 85.Within the universal jack tester control box, what is used to increase the strength of the signals to keep background noise to a minimum?
- A.
Analog digital converter.
- B.
Microprocessor.
- C.
Amplifier.
- D.
Filter.
Back to top